Problem in logic building

#1

I face problem in logic building and coding .Can you please explain line by line code by putting comments in it please

#2

I hope I’ve cleared your doubt. I ask you to please rate your experience here
Your feedback is very important. It helps us improve our platform and hence provide you
the learning experience you deserve.

On the off chance, you still have some questions or not find the answers satisfactory, you may reopen
the doubt.